This sleeve is specially made to fit the tapered stud from a tie rod end stud. These sleeves can be handy for steering conversions. The outside diameter is 0.75" and requires a 0.75" smooth hole. once in place and the tie rod is tightened the sleeve wedges into place creating a very tight fit. The TeraFlex tapered insert sleeve is also used for mounting tie rod ends in steering conversions such as the JK drag link flip kit. This tapered insert utilizes a factory stock JK drag link taper, and requires an 0.8125" OD hole. Sold individually.